Beacon not appear in Scaning


I have 3 beacons two are detect with both android and ios estimote application. But one beacon is not detected. Its not appear in scanning.Can you please help me to activate this beacon?
Third beacon configuration setting also same as other two beacon.

Thank you
Vishnu Purohit

Estimote Beacons are enabled/activated by default, so if you bought a brand-new dev kit from, you should immediately see all your beacons in the Estimote iOS/Android apps. If you don’t, email us to with your order number, and we’ll look into it.

If these are beacons you bought from a third party, or found in a drawer, then maybe the battery in that one unit is dead? In which case you can try replacing it, you can access the batteries through an opening behind the sticky tape.